Begala was asked on CNN's "The Situation Room with Wolf Blitzer" to respond to a Politico story in which former House Speaker Newt Gingrich outlined several ways for Palin to repair her image.

Although Begala called Gingrich "a brilliant political strategist," he said giving advice to Palin is an exercise in futility.

"Here's the problem," said Begala, a CNN contributor. "He is trying to treat her like a serious person. She is not. OK? She is about half a whack job. She does not have the intellectual heft of Newt Gingrich or almost anyone else in the Republican Party, and I think she has proved that."

He continued: "I admire Newt Gingrich for pretending that she is a serious person. But Sarah Palin has proven herself to be flaky and an intellectual lightweight."

Conservative journalist Terry Jeffrey, appearing alongside Begala, defended Palin for having "rock solid principles." But he said Palin needs to be more aggressive in opposing the president's policies. At this point, Jeffrey said, "I think it's not proven" she can go toe-to-toe with President Obama.